Results 41 to 50 of about 399,927 (153)

Climate change and the selective signature of the Late Ordovician mass extinction [PDF]

, 2012
Selectivity patterns provide insights into the causes of ancient extinction events. The Late Ordovician mass extinction was related to Gondwanan glaciation; however, it is still unclear whether elevated extinction rates were attributable to record ...
Finnegan, Seth, Fischer, Woodward W., Heim, Noel A., Peters, Shanan E.   +3 more
core   +3 more sources

StratPal: An R package for creating stratigraphic paleobiology modelling pipelines

Methods in Ecology and Evolution
The fossil record is an important source of information to understand biological processes that take place over timescales not accessible to human observation or experiments. Fossil data are not a perfect reflection of past biological change, but a joint
Niklas Hohmann, Emilia Jarochowska
doaj   +1 more source

Climate simulation of the latest Permian: Implications for mass extinction [PDF]

, 2005
This report presents the results of climate modeling research which indicates that elevated levels of carbon dioxide in the atmosphere at the end of the Permian period led to climatic conditions inhospitable to both marine and terrestrial life.
Benton, Berner, Berner, Campbell, Christine A. Shields, Chumakov, Grice, Holser, Hotinski, Isozaki, Jeffrey T. Kiehl, Kidder, Kutzback, Rees, Renne, Retallack, Retallack, Ryskin, Taylor, Wang, Ward, Wignall, Zhang   +22 more
core   +1 more source

A Critical Assessment of Stellar Mass Measurement Methods [PDF]

, 2015
In this paper we perform a comprehensive study of the main sources of random and systematic errors in stellar mass measurement for galaxies using their Spectral Energy Distributions (SEDs).
Acquaviva, Viviana, Ashby, Matthew L. N., Barro, Guillermo, Bell, Eric, Conselice, Christopher J., Dahlen, Tomas, Dickinson, Mark E., Faber, Sandra M., Fazio, Giovanni, Ferguson, Henry C., Finkelstein, Steven L., Finlator, Kristian, Fontana, Adriano, Galametz, Audrey, Gawiser, Eric, Giavalisco, Mauro, Grazian, Andrea, Grogin, Norman A., Gruetzbauch, Ruth, Guo, Yicheng, Hathi, Nimish, Johnson, Seth, Kocevski, Dale, Koekemoer, Anton M., Koo, David C., Lu, Yu, Mobasher, Bahram, Newman, Jeffrey A., Papovich, Casey J., Pforr, Janine, Reddy, Naveen, Salvato, Mara, Santini, Paola, Somerville, Rachel S., Wechsler, Risa H., Wiklind, Tommy, Wuyts, Stijn   +36 more
core   +6 more sources

Gastropods underwent a major taxonomic turnover during the end-Triassic marine mass extinction event.

PLoS ONE, 2022
Based on an exhaustive database of gastropod genera and subgenera during the Triassic-Jurassic transition, origination and extinction percentages and resulting diversity changes are calculated, with a particular focus on the end-Triassic mass extinction ...
Mariel Ferrari, Michael Hautmann
doaj   +1 more source

Patterns of Speciation and Extinction and the Divine Valuing of Creation [PDF]

, 2012
The near-universal concern over the current rate of species extinction must be contextualized, given the occurrence ofprevious mass extinctions during the course of Earth\'s natural history.
Bouma, Rolf
core   +1 more source

Mass reservoirs surrounding massive infrared dark clouds: A view by near-infrared dust extinction

, 2011
Context: Infrared Dark Clouds (IRDCs) harbor progenitors of high-mass stars. Little is known of the parental molecular clouds of the IRDCs. Aims: We demonstrate the feasibility of the near-infrared (NIR) dust extinction mapping in tracing the parental ...
Alves, Beuther, Beuther, Blake, Bohlin, Butler, Cambrésy, Cardelli, Carey, Casali, Combes, Egan, F. Schuller, H. Beuther, Hambly, Henning, Hernandez, Hernandez, Hewett, Hodgkin, Indebetouw, J. Alves, J. Kainulainen, Jackson, Kainulainen, Kainulainen, Kainulainen, Kauffmann, Lada, Lada, Langer, Lawrence, Lombardi, Lombardi, Lombardi, Lombardi, Lombardi, Lombardi, Lombardi, Lucas, Marshall, Marshall, Molinari, Ossenkopf, Perault, Peretto, Peretto, Pillai, Pineda, Rathborne, Rathborne, Rathborne, Robin, Roman-Duval, Roman-Duval, Román-Zúñiga, Rowles, Rygl, Schuller, Simon, T. Henning, Vasyunina, Williams   +62 more
core   +1 more source

Constraints on the Stellar/Sub-stellar Mass Function in the Inner Orion Nebula Cluster [PDF]

, 2000
We present the results of a 0.5-0.9" FWHM imaging survey at K (2.2 micron) and H (1.6 micron) covering 5.1' x 5.1' centered on Theta 1C Ori, the most massive star in the Orion Nebula Cluster (ONC).
Bessell M. S., Bouvier J., D’Antona F., Festin L., Goldsmith P. F., John M. Carpenter, Lynne A. Hillenbrand, Zinnecker H.   +7 more
core   +4 more sources

Lower Jurassic conodonts from the Inuyama area of Japan: implications for conodont extinction

Frontiers in Ecology and Evolution, 2023
It is generally accepted that conodonts went extinct at the end of the Triassic, but younger conodont fossils have been reported, and it is becoming clear that conodont extinction occurred asynchronously across different regions. Although some reports of
Yixing Du, Tetsuji Onoue, Yuki Tomimatsu, Qiangwang Wu, Manuel Rigo   +4 more
doaj   +1 more source

Effects of Disks on Gravitational Lensing by Spiral Galaxies

, 1997
Gravitational lensing of a quasar by a spiral galaxy should often be accompanied by damped Lyman-alpha absorption and dust extinction due to the intervening gaseous disk.
Abraham Loeb, Bartelmann M., Broeils A. H., Eke V. R., Fall S. M., Fukugita M., Grundahl F., Jaunsen A. O., Kauffmann G., Knapp G. R., Kylafis N. D., Malhotra S., Mao S., Matthias Bartelmann, Mestel L., Navarro J. F., Peacock J. A., Perna R., Storrie-Lombardi L. J., Tully R. B., van der Kruit P. C., Viana P. T. P., Wang Y., White S. D. M., Wiklind T., Xilouris E. M.   +25 more
core   +1 more source